public class Point {
    public int x;
    public int y;

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }
}

public class Line {
    public Point start;
    public Point end;

    public Line(Point start, Point end) {
        this.start = start;
        this.end = end;
    }
}

public class Rect {
    public Point leftUp;
    public int width;
    public int height;

    public Rect(Point leftUp, int width, int height) {
        this.leftUp = leftUp;
        this.width = width;
        this.height = height;
    }
}

//增加
public class Circle {
    // 在这里添加你的代码
}

